Administrator of robert h



t e e h S .m e e h S A d 0 e D .R E .V H R m a 0 M 0 W F. R. AVERY,Administrator. THRASHING MACHINE.

Patented ANDREW B GRAHAM.PHOTO-LITHQWASHINGTUN DC (No Model.) 4Sheets-Sheet 2 R. H. AVERY, Deod.

F. R AVERY, Administrator. THRASHING MACHINE.

)DD/D DDD DD AN uuzw a GRAHAM. PHHTOUTHQWASHI NGTON. D C.

NITED STATES Enron.

.ATENT FREDERIC It. AVERY, OF IEORIA, ILLINOIS, ADMINISTRATOR OF ROBERTE. AVERY, DECEASED.

THRESHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 561,552, dated June 9,1896. Application filed May 8, 1893. Serial No. 4='73,479%. (No model.)

To all whom it may concern.-

Be it known that ROBERT H. AVERY, deceased, late a citizen of the UnitedStates, residing at Peoria, county of Peoria, State of Illinois, and ofwhose estate FREDERIO R. AvERY,.-of Peoria aforesaid, is now theadministrator, has heretofore invented new and useful Improvements inThreshin g-Machines, of which the following is a specification,reference being had to the accompanying drawings, wherein- Figure 1 is aside elevation of a machine embodying the improvements herein set forth.Fig. 2 is a top plan of the stacker. Fig. 3 is a plan of the draftdevices. gitudinal section of the fan-shoe. Fig. 5 is a top view of apart of the shoe. Figs. 6 and 7 are perspectives of the sieve'supports.Fig.

. b is a side view of the fan-casin g and adjacent parts. Figs. 9, 10,and 11 show the failingsspout, Fig. 10 being a longitudinal section,Fig. 9 an elevation of the upper end, and Fig. 11 a plan of said end.Fig. 12 shows one end of the fan, the air-tubes being in section. Fig.13 is a cross-section of parts of the fan. Fig. 14: is a verticalsection through the vibrating table and the grain-pan. Fig. 15 is acrossscction on the dotted lines in Fig. 3. Fig. 16 is a perspective ofthe beatencylinder in Fig. 1. Fig. 17 is a perspective of the up perendless straw-carrier. Fig. 18 is a plan, and Fig. 19 a section, of therope-guide on the stacker-shaft. Fig. 20 is a perspective of thestraw-forks. Fig. 21 is a perspective of the devices for shaking therear endless strawcarrier. Fig. 22 is a perspective of the hangerarmsfor the straw-table. Fig. is a side view, partly in section, of amodified machine; and Fig. 24: is an end view of the wind-slats of thefan. Fig. 25 is a longitudinal section of thefan and adjusting parts.Fig. 26 is a view showing the same parts with one side of the casing ofthe machine removed and also showing the parts adjacent to the fan. Fig.27 is a view, largely conventional, of an ordi nary thresher-fan toillustrate its action on the air. Fig. 28 is a cross-section of thetailings-elevator shown in Fig. 10. Fig. 29 is a plan of the draftdevices for the thresher (shown folded in Fig. when they are extended toapply horses. Fig. 30 is a cross- Fig. 4 is a 1011-- section of the sameenlarged somewhat. Fig. 31 is a partial longitudinal central section ofthe straw-table, the grain-pan, the rear endless straw-carrier, theshoe, and the deflectorchute below the straw-table.

In the drawings the machine is illustrated as being mounted upontransporting-wheels.

A at the front and A at the rear, and as having a main frame, more orless similar to some heretofore in usethat is to say, a frame havingbottom sills a and one or more upper sills (1?, together with frontuprights a a and rear uprights a (l -this frame supporting a boardhousing and a cover, as at a.

At the front end the cylinder 13 is mounted in the casing at B, therebeing a concave at O wit-h a suitable grating c in rear thereof; Thestraw passes over the grating and is received upon the vibrating tableI). This table is formed with longitudinal bars d and cross-bars d, Fig.14, secured thereto. The longitudinal bars d are notched or serrated,and in each of the notches there is secured a slat or narrow strip dthese being parallel to each other, but inclined somewhat upward andbackward. To the tops of theseinclined slats there are secured upwardlyand backwardly inclined bars d, which are provided with means fortemporarily catching the straw and forcing it backward. Preferably suchmeans are provided by forming notches or serrations, as at d in theupper edges of these inclined bars (1.

The table is actuated by means of a shaft G, which is connected to thetable by pitmen g g and oscillating rockers at g g. Each of theserockers is formed with a hinge-eye 9 a downwardly-extending arm 9 and acurved arm 9 which is concentric with the hinge-eye F. The pitmen g gare pivoted to the arms g The eyes g are secured by set-screws g" toshort shafts g, which are mounted in bearings g and the curved arms 9are at the upper ends pivoted in bearings g secured to the vibratingtable. It will be seen that the curved arms g lie in front of thehinge-shafts g -that is, between said shafts and the cylinder.

The straw-table should be caused to move vertically as well aslongitudinally. To accomplish this, the pivot at 9 must during aconsiderable part of the movement of the rocker-arm g be in horizontallines below the upper end of the vertical radius of the rockerthat is tosay, the required movements of the grain-table necessitate the placingof the pivot g between the vertical plane of the hinge q and thethreshing-cylinder. To provide for this to the greatest advantage, thecurved parts q are placed between the hinges g and thethreshing-cylinder.

Heretofore it has been customary to employ a shaft supplemental to thatat G for the purpose of vibrating the table. The supplemental shaft andits attachments are here dispensed with and the shaft at G is providedwith eccentrics G or equivalents and connected directly to the vibratingtable, the vibrating parts at g being reversed in comparison with theordinary arrangement, whereby important advantages, to be hereinbelowreferred to, are attained.

G represents a beater. It is placed behind the thresher-cylinder and isformed as a smooth-surfaced drum.

material which is thrown out from the cylinder strikes it at such anangle that the berries of grain glance downward, while the straw iscarried upward on the surface of the cylinder and thrown violently bythe latter up and back. In order to attain this result, it is preferredto so arrange the beater with respect to the cylinder, the concave, andthe grate behind the concave that the latter shall lie in a planeintersecting the surface of the beater at a line somewhat below the linewhich is nearest to the grate in order that the grainberries shallglance or rebound downward.

There is a tendency for the straw to accumulate behind the beater, andconsequently the proper treatment of it is interfered with.

This clogging is overcome in the present ma chine by means of an endlessbelt or carrier G, formed of leather or other belts, and cross-bars, andso situated as to engage with and carry backward the straw, which, asaforesaid, tends to accumulate. Back of this and above the straw-shakera reciprocating mechanism G is placed for the purpose of still furtherloosening up the straw and distributing it uniformly over the shaker.This mechanism consists of a series of forks 0r toothed arms G which aresupported upon crank-shafts G. Then the machine is in operation, thearms act successively to engage with and force backward the straw.

Threshing-machines have been heretofore proposed each having a table orcarrier below the straw with an endless belt or carrier above it in somecases, and in other cases a reciproeating fork mechanism; but it isbelieved that this is the first threshin g-cylinder, the beater or drum,the lower vibrating table, the endless belt at the inner end of thestraw-table, and the fork mechanism at the rear end of which arearranged in the way herein shown, and so as to accomplish the purposesaimed at.

It revolves at a rela- Lively high speed and is so situated that the Asis well known, the straw tends to leave the threshing-cylinder invarying masses dcpendingupon the feeding of the bundles to it, therebeing almost unavoidably periods of full load on the cylinder withintervening periods of light load. As a result there are thrown backwardfrom the cylinder masses varying in their quantity and volume. These arereceived by the beater or drum, and are in turn delivered by it to theparts beyond, beginning with the vibrating straw table. The presence ofthese varying masses is detrimental to thorough separation of the grain.If an endless belt is used to support and carry them back, they tend tomaintain their irregularity in volume; and even if a reciprocating forkmechanism be placed above such endless carrier there is still a failureto break up the masses properly.

It is the aim to produce a uniform layer or sheet 011 the vibratingtable. The endless belt above the inner end of the table presses more orless on these masses and holds them so that the teeth orupwardly-extending projections of the vibrating carrier can attack themrepeatedly as they are-moving backward and tear the straws apart, sothat the lumps or masses become such a comparatively uniform layer.After this the vibrations of the lower table can more freely remove thegrain-berries, and, finally, the reciprocating fork mechanism breaks upthe sheet or stream, still further disintegrating it into loose straws,and a comparatively perfect separation is attained.

The straw passes from the rear end of the vibrating table to the endlessraddle-belt II, formed of leather or equivalent belts and woodencross-slats, and mounted upon the lower power-shaft h and the uppershaft 7L. Intermediate of these shafts there is a shaking mechanism,which, as shown,consists of a shaft 7L2, having eccentrics orcross-heads it, which lie beneath the belts and impart rapid jolts orblows to the straw as it is being carried upward and outward, to insurethe separation of grain therefrom. Below the raddle-belt is placed thereturning boards or chute Il,which extends downward and back to a pointabove the shoe.

Below the rear end of the straw-carrier there is a downward and backwardinclined chute I, which is in such position relative to the lower end ofthe bottom board H as to prevent the material which drops from thelatter from passing too far forward and causing it to be deliveredsufficiently far back from the front edge of the shoe. This chutereceives also from the straw-carrier any heads, fine straw, or otherfine particles which fail to fall through the passages between itsslats.

Below the above-described vibrating strawcarrier D is placed the grainpan or table I. This extends from the front end of the machine (from aline below the front end of the cylinder-casing) back to a line abovethe shoe. It has longitudinal sills i 2', connected by cross-bars i, andit is provided with a tight by ribs or bars i for a more perfectbackward propelling of the grain. This grain-table is also connected tothe above-described vibrating mechanism, it being pivoted at '8 to thearmy and to the table are imparted vibratory movements simultaneous withthose imparted to the straw-carrier D, but in opposite directions. Atthe sides of this grain-table flexible strips J, Fig. 14., of canvas orequivalent, are placed and joined both to the table and to the wall orcasing of the machine, so as to form perfectly-tight joints and toprevent any of the grain from passing downward. The curved arms 9 passupward through these joining strips; but by having them concentric withthe axis around which they rock they do not require apertures largerthan their own cross dimensions, and therefore they do not interferewith the tightness of the aforesaid joints, as has been the case withmachines of this class as heretofore constructed. (See Figs. 14 and 22.)

The chute I above referred to is carried by the grain-pan, it beingsecured thereto by arms or in any other suitable way to hold it properlybelow the straw-carrier and below the returning-chute H. Chute I insuresthat the material of a coarser and less desirable nature (heads, chaff,fine straw, &e.) which drops from the end of the straw-table and fromthe chute shall be carried down toward the shoe on lines other thanthose of the descent of the grain from the pan I. The forward or inneredge of the chute I should be carried inward far enough to catch thematerial from above, as aforesaid, and yet be situated so as to permit afree fallingof the cleaner grain from the end of the pan, there beingapassage for the latter to drop through.

The grain, both that which is delivered from the rear or outer end ofthe grain-table I and that delivered from the returning board or chuteII, is received in the fan -shoe K. This is constructed with themain-frame boards, more or less similar to those heretofore in use,having the side boards is, inclined bottom boards k, and tail-boards kIn the frame thus formed the screens or sieves are placed as occasionrequires, as at L L. The front or inner edges of these are supported bybrackets Z, secured to the front edges of the side walls 70, and theyare supported at their rear edges by means of detachable and adjustablecleats Z Figs. 4 to 7. Each of these cleats is formed with a portion Zand a slotted plate Z, which can be adjustably secured against the rearedge of the screen by a bolt 1". In Fig. 4 the shoe is shown with partsadapted to the winnowing of wheat, these being in this case made of thetwo screens L and L. That at L is a chaffer and is made of a rectangularframework and one or more sheets of metal cut and crimped, so as toprovide ribs, apertures, and upwardly extendinglips, The chaff and headsof wheat which may fall over the upper tables or chutes are received onthis, and by reason of the vibrations imparted to them the grain isseparated from the chaif and heads and falls through the apertures,whilethe chaff is forced backward by the lips or projections. Thewheat-screen L receives the grain from the chafier together with thesmall particles of foreign material, and after being winnowed the grainfalls through to the bottom board 76, while the impurities are carriedbackward by the blast.

In order to prevent small pieces of straw from passing over the rearedge of the chaifer down to the grain-screen or into thetailings-elevator, there is combined with the parts above described ascreen, (indicated by M.) It may consist of a series of parallel rods orwires on of such nature and so arranged as to afford no obstruction tothe backward passage of the straw; but they are spaced far enough apartto permit heads or any of the material generally referred to as tailings to fall below and be caught by the transverselyacting conveyer M. Asshown, this supplemental screen has a cross-bar m, detachably hinged byclips and pins at m so constructed as to permit the screen to be rockedup or down as wanted. These pins and clips for this screen are the samein structure and mode of attachment as that illustrated in Fig. 7 forthe screen L.

The shoe as awholeis suspended upon two links at each side of themachine, as at M M The links M are of the nature of comparatively shortlevers pivoted at m to bars secured to the walls or frame of the machineand at the lower ends pivoted to bars m, attached to the rear end of theshoe. The links M are longer than those at M and are connected to theshoe at or near its inner end. They are placed outside of themachine-casing and are fastened at m to said casing and at m to studssecured to the shoe and projecting through apertures m in the casing.

By having the supporting-links related to each other in length and inlocation in the way described advantageous movements of the shoe aresecured.

Power is imparted to the shoe for vibrating it by pitmen N, placedinside of the casing, they being pivoted to the upper ends of theaforesaid links or levers M and at n being pivoted to the sill-bars i ofthe grain-table.

IIS

Heretofore a more or less complicated mechtain throughout the entireseparating-chambera substantial continuity of the side walls of thecasing, and the boarding thereof is placed on the inside of the mainframe a a u By following the above-described plan of construction andarrangement of the parts which transmit motion from one to the other ofthe vibrating devices they are compactly placed work, so that they arepractically not exposed. These vibrating supports M are so disposed asto permit the side walls of the shoe to be brought snugly close to theinner wall of the casing, so that there shall be no air-outlet exceptthrough the shoe. Relatively long supports like the spring-hangers M arerequisite for the forward or inner end of the shoe, as it is desiredthat this part should move without any material rising or falling,whereas it is desirable that the rear end of the shoe shall havevertical motion for the purpose of shaking up and loosening the straw,heads, &c., delivered to that part of the shoe, as above described, fromthe straw-carriers D and H over the chute I.

The blast devices are indicated by O. The fan has the cross-shaft 0,upon which are mounted the spiders 0, to which are attached thecarrier-arms o and the blades 0 The casing O of the fan is closed uponthe front side and has openings or eyes at the ends, through which theair is drawn in and then forced backward.

It has been found that the ordinary endfeeding fans have causeddisadvantageous eddies of the air above and around the shoe,particularly along the central longitudinal lines, due to the fact thatthe air is not driven backward by all parts of the fan-blades uniformly.To overcome this, a tubular airguide is employed, as at 0 Preferablythere are two sections of these tubes 0 secured to the fan in such waythat some of the air which enters through each of the eyes will be drawnto the center, longitudinally, before it can be driven backward by theblades. This inven tion is not limited to any particular dimensions ofthe parts described, as they may be varied to meet differentconditions-that is to say, the air-tubes may be longer in some cases andshorter in others in relation to their diameter and to that of the eyes.Good results are obtained when the diameter of the tubes is fromone-fourth to one-half that of the fan and from one-half to two-thirdsthat of the eyes; but, as said, there can be considerable modificationin these respects.

One of the ways for securing the tubes in position is shown-namely, byconnecting them to the part which holds the blades-but in this respectalso there can be variations, as will be readily understood.

\Vhen a thresher-fan of the ordinary sort is in use, the air is drawn inthrough the eyes in two volumes whose paths are inclined or curved fromthe eyes, respectively, to points in the central longitudinal planes ofthe machine, somcwhat to the rear of the fan. At these points the twovolumes or currents of air impinge upon each other and are deflectedoutward away from the central planes on curved or inclined lines at anangle substantially equal to the angle of incidence.

lVhen the fan is constructed in the way shown herein, there are threemain jets formed, one at the center and one adjacent to each eye, andthe volume of air is driven back more uniformly than in the ordinarymachine. The sections of the two fans and the paths taken by the air inthe two machines, respectively, will be understood when a comparison istaken of Figs. 25 to 27, the latter showing the general paths taken atfirst by the air when drawn in and blown backward by the ordinarythresher-fan, and Fig. 25 illustratin g clearly how these main volumesof air are, in the present machine, divided up and delivered to thefan-blades in such way that they are prevented from transverselyimpinging on each other and rebounding outward and from the casing-wall.Careful investigation has shown that with the ordinary fans there arewithin the compartment containing the shoe areas of rarefaction to suchan ex tent that air on some longitudinal lines is actually sucked backfrom the tailings end of the screen. The employment of the tubes 0effectually overcomes this and practically all the air is forced outuniformly on parallel lines.

The main part of the fan-casing O at the bottom is extended upward, asshown at O, for the purpose of delivering a strong and condensed blastof air in the directions and at the places desired relatively to theshoe. From the upper edge of this part 0 the chute or floor 0 isextended backward and down ward, leaving the throat at 0 between it andthe shoe-floor for the escape of the grain to the conveyor. The volumeand the direction of the air as it leaves the fan are governed by aseries of relatively narrow slats P, which are mounted upon trunnionsand can be adjusted from the outside by devices at p. The lower part ofthe eye of the fan is closed by a pivoted door 0 and the upper part by asliding door 0 held in cleats o, and

the eye is provided with a shield 0 of wirenetting in two sections toprevent the entrance of straw or foreign material.

The straw-stacker is indicated by Q and may be of any of the ordinaryforms. It is supported at its lower end and at the upper end is held bythe ropes q. The latter can be wound upon the shaft Q, mounted upon thetop of the machine casing or frame. One

of the novel features of the present machine consists of the clamp bywhich the end of the rope q is connected to shaft Q. This clampcomprises the clip R, which is formed with a recess rto fitthe shaft, anextension r, and the socket 1' 1' is an eyebolt passing through anaperture in the shaft and also through the socket in the part R. The endof the rope is passed through the eye of this bolt and by means of thenut can be drawn tightly to the part B and the latter fastened tightlyto the shaft Q. The extensions 4' are so arranged that as soon as theshaft begins to revolve they will engage the rope and guide it so thatit shall be coiled inward and smoothly upon the shaft, (see Fig. 18,)and thus there is an avoidance of the uneven and outward winding of therope incident'to the devices before used and arising from the fact thatthe outer or stacker ends of the ropes are separated more than the endsat the shaft Q. (See Fig. 2.) The shaft Q is provided with thesprocketwheel (1 driven by the chain Q which also engages with thesprocket-wheel Q situated where it can be reached from the ground, andprovided with a crank Q and pawl Q. The tailings, the material passingover the parts L and L", and also some of what is blown backward by thefan, is received in the conveyer-trough at N and is pushed by theconveyer S transversely into the elevator S The box of thetailings-elevator in threshingmachines is generally tightly closed. Itis desirable to maintain a certain tension upon the chain andcarrier-flights secured thereto. In order to furnish the operator with agage for ascertainingthe tension of these parts, guides s are placed inthe box in the present machine at a point where they can be readilyvisible, and there is an aperture in the box near said guides, so thatthe position of the chain and the flights can be seen at any time. Asshown, these guides are formed of cleats so placed that when the chainsare in proper tension the flights will pass above the guides; butinstead of this a guide or gage of any suitable sort can be employed.

At the upper end of the elevator there is placed an automatically-actingdelivery device T for the tailings. As shown, it consists of a hingedspout if, having the side walls or flanges Z and the bottom 25 t thepart i normally lying more nearly horizontal than the part 25 The spoutcan drop and rise automatically. It is supported by the bar 25 havinghinge-ears 25 and arms 25 To the latter, rod i is secured, which passesthrough a guide-eye t and is provided with a spring 1 Then these devicesare used, there is no trouble experienced from a clogging or stopping ofthe tailings, as the vibrations imparted to the spout when the machineis running are sufficient to keep it clear.

The draft mechanism has been devised particularly for use in connectionwith threshingmachines, such as that herein, which it is sometimesdesired to haulby horses and sometimes by a traction-engine;

U U indicate generally the two parts of a draft mechanism, that at Ubeing a framework with a passage-way at the center longitudinally, andthat at U beingabar or beam adapted to be adjusted and fastened at oneor another point in the said passage-way. Threshers have been heretoforeprovided with a draft mechanism comprising some of these features; butin the earlier ones the central or adjustable part was fitted closely tothe side parts throughout the Whole length, and with such a constructiongreat difficulty is experienced arising from the binding or cramping ofthe parts. This is overcome in the present construction by theemployment of spacing or guiding cleats it, formed of metal, havingcleats or guides at u, Fig. 15, and which serve also to bind togetherand strengthen the frame part U. At U there is a fastener adapted tosecure the whiffletree, and at U there is a fastener to secure the adjustable parts in any desired position.

When the thresher is to be, hitched to a traction-engine, the part U ismoved to its innermost position and fastened, there being at a means forconnecting it to the engine. When it is to be hauled by horses, it isunlocked and moved to its outermost position. This is shown in Fig. 29,and at such times the draft devices are of the nature and dimensions ofa tongue, and can have horses applied, there being a whiffletree shownat the rear end.

It will be understood, of course, that this invention is not limited toa machine containing each and all of the above-described parts, as someof them may be omitted and others substituted without departingtherefrom. Thus the cylindrical drum or beater G Figs. 1 and 16, may beomitted and a beater of the ordinary character may be employed. (SeeFig. 23.) So, too, the endless carrier G and the forking mechanism G canbe omitted, and the vibrating table D can be employed alone, as in Fig.23.

hat is claimed herein is 1. In a threshing-machine, the combination withthe threshing-cylinder, and the overacting beater-drum behind thecylinder, of the longitudinally vibrating straw carrier immediatelybelow the drum or beater and receiving the straw therefrom in masses onvertical lines, and the endless straw-carrier behind the beater-drum andabove the vibrating carrier, the last said carrier having teeth orprojections below the endless carrier adapted to engage with the strawas it moves backward under the pressure of the endless carrier,substantially as set forth, whereby the masses formed by or receivedfrom the .drum or beater are formed into a substantially uniform sheetor layer, and at the same time are agitated and advanced on both theunder side of the layer and the upper side by the teeth of the carriers.

2. In a threshing-machine, the combination with the threshing-cylinder,and the drum or beater behind it, of the lower,longitudinallyreciprocating, straw-carrier with upwardlyextending teethor projections, which receive the masses of straw from the beater ordrum, the endless rotating belt above the forward part of thereciprocating carrier whereby the masses of straw are held down whilebeing advanced by the longitudin ally-reciprocating teeth for theforming of a substantially uniform relatively thin sheet of straw, andthe reciprocating fork mechanism above the rear end of the lowerreciprocating carrier adapted to finally loosen and open up the straw ofthe said sheet or layer, substantially as set forth.

3. The combination with the reciprocating straw-carrier, thegrain-table, and the shield which connects said table with thestationary wall, of the rocker-arms for said table formed on the arcs ofcircles concentric with their axes of vibration and passing through saidshield, substantially as set forth.

4. The combination with the grain-table, the parts reciprocating aboveit, and the shield that connects said table to the wall, of the Vibrating arms below the said shield formed on the arcs of circles concentricwith the axis of vibration and passing through said shield, and thepower devices below the shield, substantially as set forth. I

5. The combination with the vibrating straw-carrier, the vibratinggrain-table, and the shield J, of the vibrating rockers pivoted to saidtable and connected to said carrier by arms curved 011 the axis ofvibration and lying between said axis and the threshing-cylinder,substantially as described.

6 The combination with the inner strawcarrier, the grainpan beneath it,and the upwardly-acting straw-carrier arranged in rear of the innercarrier, of the rearwardly-inclined chute arranged below and extendingacross the space between the adjacent ends of the carriers,substantially as and for the purposes described.

7. The combination with the inner strawcarrier, the grain-pan beneathit, and the upwardly-acting straw-carrier in rear of the inner carrier,of the straw shield or chute connected to the grain-pan to vibratetherewith and extending below the adj acentends of the straw-carriers,to throw material falling from said carriers to the rear part of theshoe, substantially as set forth.

8. The combination with the inner strawca-rrier, the grain-panbeneathit, and the rear or outer straw-carrier, of the shield or chutesupported from but having its inner edge beyond the rear edge of thegrain-pan, whereby a clear passage for grain is formed between it andthe pan, said shield or chute extending below and across the spacebetween the adj acent ends of the straw-carriers, substantially as setforth.

9. The combination of the threshing-cylim der, the vibratingstraw-carrier, the vibrating grain-pan below it, the shaft Ghavingcranks,

the vibrating arms 9 for supporting the carrier and table extending fromtheir axes forward and attached to the inner end of the table at pointsin transverse planes between the axes and the threshing-cylinder wherebythey elevate the inner end of said table as they begin their movement,substantially as set forth.

10. In a'threshing-machine, the combination of the vibratingstraw-carrierD, the oppositely-vibratin g grain-pan below it, the shoevibrating oppositely to the pan, the rockerarms hinged within the casingbetween the grain-pan and the straw-carrier and pivotally connected tosaid pan and carrier on opposite sides of their hinges, there being apair of such arms at each end of the carrier and pan, the pitman Nlyingwithin the casing and connecting the grain-pan to the shoe, and thedriving-shaft connected to one of the rockerarms, substantially as setforth.

11. In a threshing-machine, the combina tion with the vibratingwinnower-shoe, the vibratin g straw-carrier, the grain-pan vibratin goppositely to both said shoe and carrier, and the casing inclosing saidparts, of the rockers hinged to the frame within the casing and arrangedin pairs one near the forward end of the carrier and the other near therear end thereof, said rockers being pivoted to the carrier above theirhinges and to the grain-pan below their hinges, the pitmen inside thecasing and connected at one end with one pair of rockers, and thevibratin g levers M fulcrumed within the casing and connected on oneside of their fulcrum with the shoe and on the other side thereof to thepitmen, substantially as set forth.

12. In a threshing-machine, the combina tion with the threshing-cylinderat the front end of the machine, the winnower-shoe at the rear end, thevibrating grain-pan extending approximately horizontal from linesbeneath said cylinder to lines above said shoe, the approximatelyparallel vibrating straw-carrier above the pan and moving oppositelythereto, of the two pairs of substantially similar rocker-arms allsupported on horizontally-arranged hinges between the pan andstrawcarrier, each rocker having a longer arm, which extends upwardlysubstantially concentric with the hinge and is pivoted to thestraw-carrier, and a shorter downward-extending arm pivoted to thegrain-pan, substantially as set forth, for the purpose specified.

13. In a threshing-machine, the combination with the vibratingwinnower-shoe, the casing which incloses it, and the straw-separatingmechanism in said casing, of the relatively long links or swingingsupports for the inner end of the shoe and lying outside the casin g,and the shorter links or swinging supports for the inner end of the shoemounted insidethe casing, substantially as set forth.

14. In a threshing-machine, the combination with the vibrating shoe, theseparating mechanism, the grain-pan arranged to deliver the grain atpoints near the inner end of the shoe, and means for delivering straw orsimilar material relatively near the rear end of the shoe, of therelatively longer links or swinging supports for the inner end of theshoe, and the relatively shorter links or swinging supports for the rearend thereof, substantially as set forth.

15. In a threshing-machine, the combination, of a rotary fan havingrotary, axial, tubular air-ducts secured to the fan, and a fancasinghaving eyes or apertures at its ends through which the air enters onlines parallel to the axis, substantially as set forth.

16. In a threshing-machine, the combination with a rotary fan, and acasing therefor having air-inlets at the ends of the fan and anair-outlet radial or tangential thereto, of tubular air-ducts at theaxis of the fan, shorter than the fan-blades and of a diameter less thanthe air-inlet apertures, substantially as set forth.

17. In a threshing-machine, the combination with the fan having therelativelylong blades and the shaft or central support therefor, of therelatively shorter air-ducts secured to the central support, and thecasing having air-inlets adapted to deliver air to the fanloladesthrough the said ducts to the central parts of the fan-blades, and alsoindependently of said ducts to the ends of the fanblade, substantiallyas set forth.

In testimony whereof I affix my signature in the presence of twoWitnesses.

FREDERIO R. AVERY, of estate of Robt. H Anew,

Administrator deceased. Witnesses:

F. H. TIGHENOR, W. N. KILBOURN.

